May 17 - President Gamal Abdal Nasser of Egypt demands withdrawal of the peacekeeping UN Emergency Force in Sinai. UN secretary-general U Thant complies (May 18). On May 23 Egypt closes the Strait of Tiran, blockading Israel's southern port of Eilat.
May 22 - The Innovation department store in the centre of Brussels (Belgium) burns down. It is the most devastating fire in Belgian history, which results in 323 dead and missing and 150 wounded.
September 4 - Vietnam War: Operation SWIFT begins - The United StatesMariness launch a search and destroy mission in Quang Nam and Quang Tin Provinces. The ensuing 4-day battle in Que Son Valley kills 114 Americans and 376 North Vietnamese.
October 21 - Egyptian surface-to-surface missile sinks the Israeli destroyer Eilat, killing 47 Israeli sailors. Israel retaliates by shelling Egyptian refineries along the Suez Canal.
November 2 - Vietnam War: US President Lyndon B. Johnson holds a secret meeting with a group of the nation's most prestigious leaders ("the Wise Men") and asks them to suggest ways to unite the American people behind the war effort. They conclude that the American people should be given more optimistic reports on the progress of the war.
November 17 - Vietnam War: Acting on optimistic reports he was given on November 13, US President Lyndon B. Johnson tells his nation that, while much remained to be done, "We are inflicting greater losses than we're taking...We are making progress." (two months later the Tet Offensive made him regret his words).
November 21 - Vietnam War: American General William Westmoreland tells news reporters: "I am absolutely certain that whereas in 1965 the enemy was winning, today he is certainly losing."
November 29 - Vietnam War: US Secretary of Defense Robert McNamara announces his pending resignation and that he will become president of the World Bank. This action was the result of US President Lyndon B. Johnson's outright rejection of McNamara's early November recommendations to freeze troop levels, stop bombing North Vietnam and handing over ground fighting to South Vietnam.
December 4 - Vietnam War: US and South Vietnamese forces engage Viet Cong troops in the Mekong Delta (235 of the 300-strong Viet Cong battalion were killed).
Lost city discovered on the island of Thera, buried under volcanic debris. It has been suggested that Plato may have heard legends about this, and used them as the germ of his story of Atlantis.